Our cars didnt have power seats as an option. Im not sure what connection is there under the seat it might be for heated seats but you would have to get the climate control out of a ses with leather for the switches. Make sure the covers you get are rated for side airbags. Katskinz are but cost $700 or so new. There are some others out there that swear theirs are too.
Realize that not all of the material will be leather if going aftermarket. Only the front seat backs and bottoms usually. The rest is vinyl. Back seat is vinyl too.
if you plan on pulling the seats outta the car thurn the key to the on position and undo the battery. Wait 15mins for the system to de energize then you should be safe to undo the airbag harness at the base of the seat. Pealing the old off and reinstalling is a breeze. There are some bits of velcro thathold the leather to the cushion and some metal loops. Reinstall the seat amd plug the bag back in. With the key still on reconnect the battery. If the bag detonates you will be well clear of it instead of you sitting down amd trying to start the car. I have done seat swaps many times and have never had an issue. This is the industry standard for dealing with bags. Better safe than sorry.
leather is a great upgrade and you will get your money out of it at time of sale. Simple to clrean, doesnt stan or smell, holds up to wear and pets. But adding heated is a must. There are many after market kits. You just have to run some wires to the fuse block and add a switch. At least with aftermarket there are multiple heat settings whereas with ford just one-on.

Ha ha sorry, I should have said I am pulling these straight out of a 2010 SES. I am not getting leather seat covers.